Timothy Sandoval of the Sacramento Beehas reported several cases of aggressive Yelpers trying to extort restaurants for cash and prizes. In one case, a restaurant owner actually offered the pissed-off customer a $60 gift card to a restaurant of the customer's choosing -- only to have the customer counter that only a $100 gift card would prevent an otherwise inevitable negative Yelp review. Unsurprisingly, the owner balked but is unsure whether the negative review ever materialized.